(Rose is in the box, on which Charlie is putting a few "finishing touches")
Charlie: There, at last. It works!
Rose: Oh, Charlie... if it works now, it'll break later; and if it doesn't break, nobody would want it; and if anybody did want it, somebody else would already own the patent...
(Hh shuts the lid, cutting her off, then returns the box to Satan's uncle/the Deliveryman.)
Deliveryman: Thanks, Charlie. You say it can't be opened now?
Charlie: You'd have to destroy that box before you could open it now.